/**
 * #      1239
 * 名称   串联字符串的最大长度
 * 链接   https://leetcode-cn.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters
 * 题解   [176](https://leetcode-cn.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters/solution)
 * 通过率 40.9%
 * 难道   中等
 */

